Test One

  1. A survey is given to 100 Kitti residents to determine whether Kitti residents want the road paved all the way to the Madolehnihmw border. At issue is whether the road will impact the local culture.  Kepar, Enipein, Wone, and Rohi are very traditional.   Pavement would make it easier for outsiders to enter this area. 
    1. What is the population?

    2. What is the sample?

    3. What is your own opinion: Should roads be built and paved into very traditional areas such as southern Kitti, Walung, or Rumung?


  2. The sibling data from our class is an example of what level of measurement?


  3. Suppose I want to be sure to collect data from students from all four states in the FSM at the national campus of the College.  I decide to pull random samples consisting of ten students from each state.  What type of sampling is this?

  4. The age of the students in MS 150 Statistics this term is given by the following data set:

    18, 19, 19, 20, 20, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 24, 24, 25, 25, 26
    1. What is the range for this data?___________________________
    2. Divide the range into 4 intervals (classes).  Record the intervals below.
      Interval (Class) Tally Relative Frequency

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________

      _______________
    3. Tally the data into the intervals (classes) in the table above.  Include your class upper limit (CUL) in the class.

    4. Sketch a histogram of the data, labeling your horizontal axis as appropriate.
      histo6by8.gif (4911 bytes)
    5. Calculate the relative frequency for each interval (class) in the table above.
    6. Find the mode of the data ___________
    7. Find the median of the data ___________
    8. Find the mean of the data given.___________
    9. Calculate the (xi - mean) values for each age value, writing the result for each age in the table below.
      Age (xi - mean)
      18 __________
      19 __________
      19 __________
      20 __________
      20 __________
      21 __________
      21 __________
      21 __________
      22 __________
      22 __________
      22 __________
      22 __________
      23 __________
      23 __________
      23 __________
      24 __________
      24 __________
      25 __________
      25 __________
      26 __________

      Sum S(xi - mean):

      __________
    10. Calculate the sum of the (xi - mean) and record this in the last row of the table above.
    11. What is the value of n for this data set? _____________
    12. Find the sample standard deviation of the data given using the formula:
      stdev.gif (1230 bytes)

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